Can one pair of single eyes be adjusted by double eyelid surgery? It is perfectly possible! The situation of one double and one single eye is partly congenital, and partly due to poor surgical results and other reasons. If one side of the eyelid is in good shape, you can follow this side to make the opposite side without double eyelid into the corresponding shape; if you are not satisfied with the existing side of double eyelid, you can do both sides again. In addition, the surgeon will identify the cause of the difference between the two sides, carefully examine it to determine if there is a disease such as ptosis, and then treat the cause accordingly. Will the width be different after double eyelid surgery? It is entirely possible! This is because the vast majority of people are born with an asymmetry in their eyes, which is most evident in photos such as identity documents. Some of this discrepancy can be surgically adjusted. However, in many cases it is simply not possible to obtain a complete correction. Secondly, the tissues of the eyelids are exceptionally fine, and various factors such as tissue peeling, excision, bleeding, hemostasis, and suturing during the surgery may have post-operative differences, which can also cause post-operative double eyelid size differences, which can be controlled to a minimum by an experienced professional surgeon.